I have read from multiple people on here not to feed peas to your fish. The reasoning is that it is supposed to cause constipation for your fish. However, I do not have any personal experience with this myself.

Also, Betta Care/ Betta Chat would have been viable options as well. (:

I've been told by oldfishlady that peas can be used effectively to treat constipation (not swim bladder issues). But you don't need to do it weekly. Fasting for a day will give you the same result, unless the fish are suffering from severe constipation.